Jacques boqopolsky



Sept. 6, 1932. J. BOGOPOLSKY 1,376,392

AUTOMATIC APPARATUS FOR TAKING CINEMATOGRAPHIC PICTURES Filed March 24. 1927 M m m n \M f/ (J! AW .1 n 1 t K, 1 M E v F L Z. mm 2 5 3 3 n HT QJ a P j 5 1 u .M W n: T w 5 n, J. H W. fi I a w 7.. Z I 7 6 w u w n u a b 1 w 5 M m M 9 3 8 a 6 l 2 D a N 8 T .a w 95$ M -m b Patented Sept. 6, 1932 PATENT OFFICE JACQUES BOGOPOLSKY, F GENEVA, SWITZERLAND AUTOMATIC APPARATUS FOR TAKING CINEMATOGRAPHIC PICTURES Application filed March 24, 1927, Serial No. 178,033, and in Switzerland October 9, 1926.

tus for moving it, the optical system and the exposure chamber, separate means of access being provided to each compartment.

The accompanying drawing shows by way of example, one form of apparatus embodying the invention. v r Fig. 1 shows the apparatus in side elevation,

Fig. 2 is a sectional view on the line AB of Fig. 1, and

Fig. 3 is an elevation of the other side.

The apparatus comprises a box 1 (Fig. 1) having a central partition 2 (Fig. 2) dividing said box into two compartments. Within compartment 1 is arranged an enclosed space 3 containing a shutter 9 in the form of a cylinder provided with two co-axial windows. The compartment 4 contains two film spools 5 and 5a and a gate 7 provided with a tension plate 8 and which serves to determine the path of the film. A claw 10 is furnished with a lug 11 pivoted at L2 and is operated by an eccentric 13. A film 14 linrolling from the free bobbin 5 is moved by a sprocket 6, against which it is pressed by rollers 17 and 18 carried by an arm 21. pivoted at 23. After having been formed into a loop 24 the film passes into the gate formed by the members 7 and S and across the exposure opening in line with the objective 4a and the shutter 9. It

is drawn through the gate by the claw 10,v

forms a second loop 25 and then returns again to the sprocket 6 against which it is ur d 45 by a furtherpair of rollers 19 and 20 carried by the arm 22, also pivoted at 23. Thence the film-is rolled on to the spool 5a rotated by the axle 6a through a pulley and a belt 7a driven from the sprocket 6.

' The second compartment of the box which is completely separated from the first by the wall 2 (Figs. 2 and 3) encloses a spring barrel 27 containing the driving spring not shown, and upon the outside of the box is mounted a toothed crown wheel 27a. This 5 crown wheel gears with a pinion 28 which is rigid with a wheel 29 the axle of which carries and drives the sprocket 6. The wheel 29 gears with a pinion 30 keyed on a shaft on which the shutter 9 is fixedly mounted. so Through an intermediate gear wheel 31, the wheel 29 also drives the pinion 32 on which is keyed a fly wheel 33 carrying two levers 34 and 35 pivoted respectively at 36 and 37. These levers carry two weights 38 and 39 con- 65 nected by a spring 40 and the whole assembly forms a centrifugal brake operating by friction upon a ring concentric with the fly wheel 33. A lever 41 pivoted at 42 carries a yielding body 41a on its free end and is operable from the exterior of the apparatus by a stud 43 connected with the lever at 44. The lever 41. is pulled by a spring 45 and serves as a stop for the mechanism through the yielding body 41a engaging with the free end of a spiral spring 45a fixed at its other end to the pinion 30 of the shutter. Stopping of the apparatus, though taking place very suddenly,

is effected quite gentlyowing to the shock absorbing action of the two yielding members 41a and 45a. The shaft 32 rigid with the fly wheel 33 and the speed regulating mechanism, carries at its opposite end the eccentric 13 which controls the catch 10 (Figs. 1 and 2).

A toothed wheel 46 (Fig; 3) is pivoted at 35 47 outside the spring barrel and serves as an indicator or counter. A spring 49 in the form of a pawl is fixedly mounted at 50. During the rotation of the spring barrel 27 a pin 51 fixedly mounted on said spring barrel engages with the lower end of the pawl and'the free'end of the latter abuts against one of the teeth 48 and causes the indicator 46 to rotate through a part of a turn. As soon as the pin 51 has passed the end of the' pawl 49 the latter springs rapidly to its original position and produces a characteristic sound which gives the operator audible indication of the degree to which the film is un wound. The wheel 46 also carries indications which are visible through an observation window 62.

The view finder for. horizontal viewing comprises a plano-convex lens 52 and an aperture 56. A mirror 53 pivoted at 5 1 and a viewing aperture 57 permits vertical view finding. To this end it is sufficient to swing the mirror 58 about its pivot into a position at 15 (the position shown in the drawing). When viewing through the opening 56 the mirror 53 is rocked into a position where it lies against the window 57 Two cover plates 26 and 26a (Fig. 2) complete the apparatus. The former is removable to give access to the film compartment.

A key 63 is connected to the shaft of the spring barrel 27 to permit the winding of the motor.

In order that it shall be possible to use the two kinds of perforated films as well as films of different sizes with the camera, the claw 10 is furnished with a yielding member 59 carrying a hook 60 (Fig. 2) and a movable member 61 is provided on the gate 7 (Fig. 1). If it is desired, for example, to use a film having marginal perforations, the member 61 is raised so that at the moment when the hooks of the claw enter the gate the central hook 60 of the claw carried by the yielding member 59 contacts with the member 61 and the hooks 61a and 62 only of the claw enter the two marginal perforations of the film to move the latter.

In the other case where it is desired to use a film with central perforations the member 61 is removed from the position previously referred to and the hook 60 is thus rendered free to enter the gate where it engages the central perforation and moves the film. It should be pointed out that films with marginal perforations are always considerably wider than films with central perforations. Consequently if the last mentioned kind of film is being used the hooks 61a and 62 of the claw pass outside the two edges of the film without contacting therewith and only the hook 60 comes into action.

In order that only the useful part of the power stored in the driving spring shall be used, the shaft of the spring barrel 27 carries a member 64 having a finger 65 and the side of the spring barrel carries a star 66 in the form of a Maltese cross with many branches. When the spring barrel has made a certain number of turns about its axis, during the unwinding of the spring, the finger 65 engages against an arm 67 of the star, which arm is of extra length, and stops the mechanism. The star carries indications which can be observed through a window 68, and which indicate the degree of tension left in the spring. A spring 69 by tapping on the branches of the star produces a sound which serves to call attention to the end of the drive of the spring barrel. The counter disc 46 i for the film may even be replaced by the star 66, the two indicating functions being carried out by one member. A single sound would serve as an indication of the degree to which the film is unwound and a double sound would serve to indicate the extent to which the spring in the spring barrel is run down.

What I claim is:

In an apparatus for taking moving pictures, a casing having an I-cross section and forming two adjacent but separate chambers, driving mechanism, including a spring motor, gears, a governor, a counter, and a brake in one of the chambers, all of the r0- tatable shafts in said chamber having their axes perpendicular to the partition between the compartments, and some of said shafts extending through the partition into the other chamber, a cylindrical shutter mounted on one of said extending shafts, an eccentric mounted on another of the extending shafts, feeding means for the film driven by said eccentric, a sprocket mounted on another of the extending shafts for supplying film to the feeding means and discharging the film therefrom and film spools and means for rotating one of said film spools from the shaft carrying the sprocket.

In testimony whereof I affix my signature.

JACQUES BOGOPOLSKY.

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